// Copyright 2021 CloudWeGo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

package constants

import (
	"net"
	"os"
	"strings"
)

func GetIp(key string) string {
	ip := os.Getenv(key)
	if ip == "" {
		ip = "localhost"
	}
	return ip
}

func GetOutBoundIP() (ip string, err error) {
	conn, err := net.Dial("udp", "8.8.8.8:53")
	if err != nil {
		return
	}
	localAddr := conn.LocalAddr().(*net.UDPAddr)
	ip = strings.Split(localAddr.String(), ":")[0]
	return
}
